A pre-warning sheet pile foundation pit supporting structure

Abstract

This invention relates to the field of sheet pile support and provides a pre-warning sheet pile foundation pit support structure, comprising: an outer plate, a sliding plate, an inner plate, an H-shaped horizontal support, a large U-shaped support, a pre-warning structure, locking hooks, and locking hook grooves. A sliding plate is fixedly connected to one side of the lower end of the outer plate. An inner plate is fixedly connected to the sliding plate on the side away from the outer plate. An H-shaped horizontal support is fixedly connected to the inner plate on the side away from the outer plate. The pre-warning structure includes a small U-shaped support, with large U-shaped supports slidably connected to both sides of the small U-shaped support. This invention addresses the problems of overall instability and support stability in existing technologies by having the small U-shaped support compressed and moved upwards, simultaneously causing the sliding connector to be compressed and moved upwards, allowing a pressure sensor to detect pressure. The locking hooks and locking hook grooves engage and fix the structure, thus solving these problems.

Description

Technical Field

[0001] This invention relates to the field of sheet pile support, specifically a pre-warning sheet pile foundation pit support structure. Background Technology

[0002] With the rapid development of high-rise buildings in cities, various needs such as underground parking lots, deep burial of high-rise buildings, and civil defense require the support, reinforcement and protection measures for the side walls and surrounding environment to ensure the safety of the construction of underground structures and the surrounding environment. As a structural system, the foundation pit support should meet the requirements of stability and deformation, that is, the requirements of the two limit states mentioned in the specifications, namely the ultimate limit state of bearing capacity and the serviceability limit state.

[0003] Chinese Publication No. CN116469228A discloses a monitoring and early warning device for the stress movement of a deep foundation pit support structure, comprising: a support and fixing mechanism, an alarm device, and a triggering mechanism. The support and fixing mechanism includes an arc-shaped vertical plate and a fixing component. The fixing component is installed on the top of the arc-shaped vertical plate. A strip-shaped slot is formed on the side of the arc-shaped vertical plate. The alarm device is installed on the outer side of the arc-shaped vertical plate, and multiple sets of triggering mechanisms are respectively installed on the outer side of the arc-shaped vertical plate. Multiple guide rods are pre-set to contact each other at different positions on the outer wall of the support column in the deep foundation pit. When the support column tilts, the guide rod is pushed to move along the guide rod axis inside the strip-shaped slot. The moving guide rod drives the connecting rod to rotate, causing the contact rod at the bottom of the connecting rod to move and trigger the switch. The alarm device then sounds an alarm, achieving a good early warning effect and effectively reducing the occurrence of deep foundation pit construction accidents. Although the above invention can achieve a good early warning effect by using a structural trigger switch, the general construction site environment is relatively noisy, and the sound may not be heard from a distance. In addition, some small foundation pit collapses are only collapses at a certain slope and will not collapse as a whole, but will only cause the overall instability of the foundation pit.

[0004] In cases of overall instability of the foundation pit, the soil forms a sliding surface, and the retaining structure, along with the soil blocks on the outside and bottom of the pit, loses stability. The typical instability pattern is that the upper part of the support structure tilts outward from the pit, while the bottom of the support structure moves inward from the pit. The soil at the bottom of the pit bulges, and the ground outside the pit sinks. At this time, the outward tilting of the support may push it down along with the soil tumbling into the pit, potentially causing further casualties.

[0005] In summary, the present invention provides a pre-warning sheet pile foundation pit support structure to solve the above problems. Summary of the Invention

[0006] This invention provides a pre-warning sheet pile foundation pit support structure. By squeezing and moving the small U-shaped support upward, the sliding connector is also squeezed and moved upward, allowing the pressure sensor to sense the pressure. The locking hook and the locking hook groove fit together and are fixed, thus solving the problems of overall instability and support stability of the foundation pit in the prior art.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A predictable sheet pile foundation pit support structure, comprising:

[0009] The outer panel has a sliding plate fixedly connected to one side of its lower end, and an inner panel fixedly connected to the sliding plate on the side away from the outer panel. The fixed connection is preferably welded. An H-shaped horizontal support is fixedly connected to the inner panel on the side away from the outer panel. The fixed connection is preferably welded.

[0010] The warning structure includes a small U-shaped support, with large U-shaped supports slidably connected to both sides of the small U-shaped support. A sliding connector is provided on one side of the small U-shaped support, and a snap-fit ​​connector is fixedly connected to the inner side of the sliding connector. The fixed connection is preferably riveted. A telescopic rod is fixedly connected to the inner side of the snap-fit ​​connector. The fixed connection is preferably riveted. A pressure sensor is fixedly connected to one end of the telescopic rod. The fixed connection is preferably riveted. A spring is sleeved on the outer side of the telescopic rod.

[0011] Preferably, one end of the large U-shaped support is fixedly connected with a locking hook, and the other end of the large U-shaped support is provided with a locking hook groove. The locking hook groove and the locking hook fit together, and the locking hook and the locking hook groove can fit together and be fixed when contracted.

[0012] Preferably, the large U-shaped support is divided into two parts of the same size and shape, the two parts of the large U-shaped support are not connected, one part of the large U-shaped support is fixedly connected to the bottom of the sliding plate, and the other part of the large U-shaped support is set on the top of the sliding plate, and the fixed connection is preferably welded.

[0013] Preferably, the U-shaped end of the large U-shaped support at the corner is a corner slope, and the corner slope is fixedly connected to the corner slope on the other side at the corner, and the fixed connection is preferably welded.

[0014] Preferably, the large U-shaped support is disposed between the outer plate and the inner plate, and the large U-shaped support is slidably connected to the top of the sliding plate. The large U-shaped support array is distributed on the top of the sliding plate, and multiple early warning structures are arrayed between the two large U-shaped supports.

[0015] Preferably, in the early warning structure, the outer wall of the small U-shaped support is slidably connected to the outer wall of the large U-shaped support, and the outer wall of the sliding connector is also slidably connected to the outer wall of the large U-shaped support away from the small U-shaped support.

[0016] Preferably, the sliding connector is divided into two parts of completely equal size, and these two parts of the sliding connector are fixedly connected to each other, preferably by riveting.

[0017] Preferably, multiple snap-fit ​​connectors and pressure sensor arrays are distributed across multiple large U-shaped supports.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This invention solves the problem that when the outer plate of the stress surface is subjected to compression or thrust, the small U-shaped support is compressed and moved upward, which in turn causes the sliding connector to be compressed and moved upward, causing the telescopic rod and spring to contract and squeeze the pressure sensor inward. When the pressure sensor receives the compression and senses the pressure, it forms an early warning effect, thus solving the problem that when pressure is generated on any side of the foundation pit, that side will issue an early warning.

[0020] 2. In the event of overall instability of the foundation pit, the present invention solves the problems of early warning of overall instability of the foundation pit and support stability by connecting and locking the large U-shaped supports with locking hooks and locking hook grooves to form a more robust support structure to resist the phenomenon of soil sliding from the outside of the pit to the inside of the pit caused by overall instability. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of the sheet pile foundation pit support structure of the present invention;

[0022] Figure 2 This is a top view of the corner of the sheet pile foundation pit support structure of the present invention;

[0023] Figure 3 This is a top view of the sheet pile support arrangement of the sheet pile foundation pit support structure of the present invention;

[0024] Figure 4 This is a three-dimensional view of the internal structure of the sheet pile foundation pit support of the present invention.

[0025] Figure 5 This is an exploded view of the sheet pile support structure for foundation pits according to the present invention.

[0026] Figure 6 This is an exploded view of the interior of the sheet pile support structure for foundation pits according to the present invention.

[0027] Figure 7 These are detailed drawings of the sheet pile support structure for foundation pits according to the present invention.

[0028] In the picture:

[0029] 1. Outer panel; 2. Sliding plate; 3. Inner panel; 4. H-type horizontal support;

[0030] 5. Large U-shaped support; 51. Locking hook; 52. Locking hook groove; 53. Corner ramp;

[0031] 6. Early warning structure; 61. Small U-shaped support; 62. Sliding connector; 63. Snap connector; 64. Telescopic rod; 65. Spring; 66. Pressure sensor. Implementation

[0032] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0033] This invention provides a pre-warning sheet pile foundation pit support structure, comprising:

[0034] Outer panel 1, a sliding plate 2 is fixedly connected to one side of the lower end of the outer panel 1, an inner panel 3 is fixedly connected to the sliding plate 2 on the side away from the outer panel 1, and an H-shaped horizontal support 4 is fixedly connected to the inner panel 3 on the side away from the outer panel 1.

[0035] The warning structure 6 includes a small U-shaped support 61, with large U-shaped supports 5 slidably connected to both sides of the small U-shaped support 61. A sliding connector 62 is provided on one side of the small U-shaped support 61, and a snap-fit ​​connector 63 is fixedly connected to the inner side of the sliding connector 62. A telescopic rod 64 is fixedly connected to the inner side of the snap-fit ​​connector 63, and a pressure sensor 66 is fixedly connected to one end of the telescopic rod 64. A spring 65 is sleeved on the outer side of the telescopic rod 64. When the entire support structure feels pressure from the outside in, the large U-shaped supports 5 retract inward. The inward retraction of the two large U-shaped supports 5 causes the sliding connector 62 and the small U-shaped support 61 to slide outward towards the U-shaped gap between the two large U-shaped supports 5 until the sliding connector 62 abuts against the inner side of the outer plate 1. When pressure is felt on one of the walls, the spring 65 immediately senses the pressure and tightens towards the pressure sensor 66 when the telescopic rod 64 retracts. When pressure is sensed, the indicator light then changes color according to the pressure.

[0036] As one embodiment of the present invention: a locking hook 51 is fixedly connected to one end of the large U-shaped support 5, and a locking hook groove 52 is provided at the other end of the large U-shaped support 5. The locking hook groove 52 fits with the locking hook 51. When the large U-shaped support 5 feels inward pressure, the large U-shaped supports 5 on both sides contract inward, and the locking hooks 51 and locking hook grooves 52 at both ends of the large U-shaped support 5 fit together and lock.

[0037] As one embodiment of the present invention: the large U-shaped support 5 is divided into two parts of the same size and shape. The two parts of the large U-shaped support 5 are not connected. One part of the large U-shaped support 5 is fixedly connected to the bottom of the sliding plate 2, and the other part of the large U-shaped support 5 is set on the top of the sliding plate 2. The large U-shaped support 5 is located at the bottom of the sliding plate 2.

[0038] As one embodiment of the present invention: the large U-shaped support 5 has a U-shaped end at the corner forming a corner slope 53. The corner slope 53 is fixedly connected to the other corner slope 53 at the corner. The large U-shaped support 5 at the corner is connected to each other through the corner slopes 53 on both sides and fixed with bolts to achieve the corner effect. The outer layer is also fixed with an outer plate.

[0039] In one embodiment of the present invention: the large U-shaped support 5 is disposed between the outer plate 1 and the inner plate 3, and the large U-shaped support 5 is slidably connected to the top of the sliding plate 2. The large U-shaped support 5 is arrayed on the top of the sliding plate 2, and multiple early warning structures 6 are arrayed between the two large U-shaped supports 5.

[0040] As one embodiment of the present invention: in the early warning structure 6, the outer wall of the small U-shaped support 61 is slidably connected to the outer wall of the large U-shaped support 5, and the outer wall of the sliding connector 62 is also slidably connected to the outer wall of the large U-shaped support 5 away from the small U-shaped support 61.

[0041] As one embodiment of the present invention: the sliding connector 62 is divided into two parts of completely equal size. The two parts of the sliding connector 62 are fixedly connected to each other. The sliding connectors 62 on both sides are fixedly connected at the central axis position and one side is tightly attached to the side of the pressure sensor 66.

[0042] In one embodiment of the present invention: a plurality of the snap-fit ​​connectors 63 and pressure sensors 66 are arrayed on the inner side of a plurality of large U-shaped supports 5, and the pressure sensors 66 are also connected to an indicator light for displaying pressure.

[0043] Specific working principle:

[0044] like Figure 1-3As shown, when the foundation pit is excavated and sheet pile support is installed, the position of the sliding plate 2 is first determined. After the position is determined, the sliding plate 2 is fixed to the large U-shaped support 5, which is fixed to the bottom of the sliding plate 2, and then the outer plate 1 is fixed along one side of the sliding plate 2. The outer plate 1 is fixed to the inner wall of the foundation pit using large screws. Then the U-shaped bottom of the large U-shaped support 5 is installed along the inner wall of the outer plate 1. At the corner, the corner slope 53 is fixed with multiple bolts. Then the small U-shaped support 61 is inserted between the two large U-shaped supports 5. Next, the sliding connector 62 is fixed to the pressure sensor 66 and then slid along the inner wall of the outer plate 1 to the appropriate position. Then the inner plate 3 and the inner H-shaped horizontal support 4 are fixed.

[0045] Under normal use, such as Figure 3 As shown, the bottom of the small U-shaped support 61 is tightly attached to the lowest point of the outer wall of the large U-shaped support 5. The sliding connector 62 is located in the middle of the outer wall of the inclined surface of the large U-shaped support 5. At this time, the pressure sensor 66 senses a normal pressure value, and the locking hook 51 is not connected to the locking hook groove 52. The indicator light connected to the pressure sensor 66 is green. At this time, the entire support structure is in its maximum extended position. When one side of the outer plate 1 senses inward pressure, the outer plate 1 that senses the pressure pushes inward, causing the two large U-shaped supports 5 on both sides to slide in the same direction. Figure 3 As shown, the large U-shaped support 5 slides to the left and forms a compression with the adjacent large U-shaped support 5, causing the small U-shaped support 61 to slide upward. At the same time, the sliding connector 62, which is made of soft material, also slides upward. When the sliding connector 62 slides upward until it hits the outer plate 1 and can no longer slide, the compression continues, which will deform the sliding connector 62 and compress the telescopic rod 64 inward. At the same time, the spring 65 contracts, causing the pressure sensor 66 to sense the pressure. At this time, the indicator light connected to the outside of the pressure sensor 66 changes from green to red, and the buzzer sounds to remind that the pressure is too high. If the personnel who discover the abnormality need to move away from the area around the red indicator light or take remedial measures in time.

[0046] It should be noted that: such as Figure 3 As shown, when the pressure reaches the maximum value that the support structure can withstand, the small U-shaped support 61 slides upward and abuts against the bottom of the sliding connector 62. At this time, the sliding connector 62 has been squeezed and deformed. The pressure sensor 66 senses the high pressure, and the locking hook 51 is inserted into the locking hook groove 52 to fit and fix itself. When the same side feels further thrust, because the locking hook 51 and the locking hook groove 52 are fixed, multiple large U-shaped supports 5 form a support structure with a higher distribution density, which can resist the thrust brought inward by the outer soil at a higher level.

[0047] When the foundation pit becomes unstable, the bottom of the support structure will move inward, turning the entire support structure into a situation where the lower end contracts inward and the upper end tilts outward. At this time, because the lower end of the support structure contracts inward and the locking hook 51 and locking hook groove 52 fit together and are connected and locked, while the upper end locking hook 51 and locking hook groove 52 are not connected, the small U-shaped support 61 connected at the lower end and pressing outward pushes the sliding connector 62 against the outer plate 1 and generates a relative force with the soil into the foundation pit. Even if the large U-shaped support 5 below the sliding plate 2 tilts outward, the large U-shaped support 5 above the sliding plate 2 forms a high-density barrier wall due to locking, preventing the soil from sliding into the foundation pit.

[0048] This invention solves the problems of early warning of overall pit instability and support stability by compressing or pushing the outer plate 1 of the stress surface, causing the small U-shaped support 61 to be compressed and moved upward, and simultaneously causing the sliding connector 62 to be compressed and moved upward, so that the pressure sensor 66 receives the compression and senses the pressure, thus forming an early warning effect. In the event of overall pit instability, the large U-shaped supports 5 are connected and locked together by the locking hooks 51 and locking hook grooves 52 to form a more robust support structure to resist the phenomenon of soil sliding from the outside of the pit to the inside of the pit caused by overall instability.

[0049] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pre-alarmed sheet pile foundation pit support structure, characterized by, Include: The outer plate (1), the lower end of the outer plate (1) is fixedly connected with the sliding plate (2), the sliding plate (2) is fixedly connected with the inner plate (3) away from the outer plate (1), the inner plate (3) is fixedly connected with the H type horizontal support (4) away from the outer plate (1); The early warning structure (6) includes a small U type support (61) in it, the small U type support (61) is slidably connected with the large U type support (5) on both sides, the small U type support (61) is provided with a sliding connector (62) on one side, the sliding connector (62) is fixedly connected with a buckle connector (63) on the inner side, the buckle connector (63) is fixedly connected with a telescopic rod (64) on the inner side, one end of the telescopic rod (64) is fixedly connected with a pressure sensor (66), and the telescopic rod (64) is provided with a spring (65) on the outer side; The large U type support (5) is arranged between the outer plate (1) and the inner plate (3), and the large U type support (5) is slidably connected to the top of the sliding plate (2), the large U type support (5) is arrayed on the top of the sliding plate (2), and a plurality of early warning structures (6) are arrayed between the two large U type supports (5); The large U type support (5) is fixedly connected with a lock hook (51) at one end of the U type, and a lock hook groove (52) is formed at the other end of the U type, and the lock hook groove (52) is matched with the lock hook (51); The large U type support (5) is divided into two parts with the same size and shape, the two parts of the large U type support (5) are not connected, one part of the large U type support (5) is fixedly connected to the bottom of the sliding plate (2), and the other part of the large U type support (5) is arranged on the top of the sliding plate (2); The U type end of the large U type support (5) at the corner is a corner inclined surface (53), and the corner inclined surface (53) is fixedly connected with the other side corner inclined surface (53) at the corner.

2. A pre-warnable sheet pile foundation support structure according to claim 1, wherein: In the early warning structure (6), the outer wall of the small U type support (61) is slidably connected to the outer wall of the large U type support (5), and the outer wall of the sliding connector (62) is also slidably connected to the outer wall of the large U type support (5) away from the small U type support (61).

3. The pre-warnable sheet pile foundation pit support structure according to claim 1, characterized in that: The sliding connector (62) is divided into two parts with the same size, and the two parts of the sliding connector (62) are fixedly connected with each other.

4. The pre-warnable sheet pile foundation support structure according to claim 1, wherein: A plurality of buckle connectors (63) and pressure sensors (66) are arrayed in a plurality of large U type supports (5).

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